#include <iostream>

int main()
{
    using namespace std;

    cout << "This program may reformat your hard disk." << endl
         << "and distroy all your data" << endl
         << "Do you wish t ocontinue? <y/n>";

    char ch;
    cin >> ch;
    if (ch == 'y' || ch == 'Y')
        cout << "You were waned!\a\a" << endl;
    else if (ch == 'n' || ch == 'N')
        cout << "A wise choice ... bye!" << endl;
    else
        cout << "That was't a y or n! Apparently you "
                "can't follow \n instructions, so "
                "I'll trash you disk anyway.\a\a\a" << endl;

    return 0;
}